3921570961 has 16 divisors (see below), whose sum is σ = 4910791680. Its totient is φ = 3042294480.

The previous prime is 3921570943. The next prime is 3921570971. The reversal of 3921570961 is 1690751293.

It is a cyclic number.

It is not a de Polignac number, because 3921570961 - 2²⁵ = 3888016529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3921570901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 94701 + ... + 129658.

It is an arithmetic number, because the mean of its divisors is an integer number (306924480).

Almost surely, 2^3921570961 is an apocalyptic number.

It is an amenable number.

3921570961 is a deficient number, since it is larger than the sum of its proper divisors (989220719).

3921570961 is a wasteful number, since it uses less digits than its factorization.

3921570961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224604.

The product of its (nonzero) digits is 102060, while the sum is 43.

The square root of 3921570961 is about 62622.4477404070. The cubic root of 3921570961 is about 1576.9576344303.

The spelling of 3921570961 in words is "three billion, nine hundred twenty-one million, five hundred seventy thousand, nine hundred sixty-one".